package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.OrderMapper;
import com.itheima.reggie.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {

    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;

    @Override
    @Transactional
    public void submit(Orders order) {
        //1. 获取用户id
        Long userId = BaseContext.getCurrentId();

        //2. 获取购物车明细 --> 一个购物车名称  对应  一个订单明细
        LambdaQueryWrapper<ShoppingCart> lqw = new LambdaQueryWrapper<>();
        lqw.eq(ShoppingCart::getUserId, userId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(lqw);

        if (shoppingCarts == null || shoppingCarts.size() == 0) {
            throw new CustomException("购物车为空，不能下单");
        }
        //3. 获取用户信息
        User user = userService.getById(userId);

        //4. 获取地址信息
        Long addressBookId = order.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if (addressBook == null) {
            throw new CustomException("用户地址信息有误，不能下单");
        }

        long orderId = IdWorker.getId();//订单号

        AtomicInteger amount = new AtomicInteger(0); // 订单总金额

        // 订单详情
        List<OrderDetail> orderDetails = shoppingCarts.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId); // 所属订单号
            orderDetail.setNumber(item.getNumber()); // 数量
            orderDetail.setDishFlavor(item.getDishFlavor()); // 口味
            orderDetail.setDishId(item.getDishId()); // 菜品ID
            orderDetail.setSetmealId(item.getSetmealId()); // 套餐ID
            orderDetail.setName(item.getName());  // 菜品名称
            orderDetail.setImage(item.getImage()); // 图片
            orderDetail.setAmount(item.getAmount()); // 旦佳节
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue()); // 总金额累加
            return orderDetail;
        }).collect(Collectors.toList());

        // 订单信息
        order.setId(orderId);
        order.setOrderTime(LocalDateTime.now());
        order.setCheckoutTime(LocalDateTime.now());
        order.setStatus(2);
        order.setAmount(new BigDecimal(amount.get()));//总金额
        order.setUserId(userId);
        order.setNumber(String.valueOf(orderId));
        order.setUserName(user.getName());
        order.setConsignee(addressBook.getConsignee());
        order.setPhone(addressBook.getPhone());
        order.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        //向订单表插入数据，一条数据
        this.save(order);

        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);

        //清空购物车数据
        shoppingCartService.remove(lqw);
    }

}
